Improvement in blasting-fuses



J. R. POWELL; Blasting-Fuse.

Pat ented May 13, 1879 To all whom it may} 0mm.

.squib'in the drill-hole; and toiobv'iate'tl cessity of such complicated'squibs,

, danger resulting from the frequentp explosions of squibs now in us'e',i

' of my present invention. Y

i As already stated, squibs, M

f .structed, have the fuse or match i one end thereof. Now, a. priucipal'fef my invention consists in making the E separate and independent of the s'qu v kisodisposing of: it that the latter shalljbe nited upon the side instead of at the ends f I To this endI construct the squibs Aof tubes of straw or paper, orother combustible material,

', sealed at one end with a mixture of Burgundy Y roWEIJIZ, 0F

-. I Ml ROVEMENT lN BL A STl NG-F USES.

l Specification forming part of Letters Patent No. 215,395, dated May 13, 1879 M April3,1B79.,

Be it: known that I, JOHN R. POWELL, of Plymouth, in the county of v Luzerne and State of Pennsylvania, have invented certain new and useful Improvements in Miners Safety Squibs for Blasting Purposes; and I do'hereby declare the following to be a full, clear,and exact description of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being bad to the accompanying drawings,.

and to letters of reference marked thereon, which form a partof this specification,and in which Figure 1 is a perspective view, alon'gitndinal sectionalview. l- Similer letters of. reference indicate corresponding parts in both figures.

This invention relates to safety-squibs for and Fig. 2 is miners;-and it consistsin certain improve-- ments in the same, which will be hereinafter fully described, and particularly; pointed out in the claims.

Miners squibs, as usually constructed, are

tubes of straw or paper filled with gunpowder, sealed, and provided at -on'e' end with ,a

match or fuse. These squibs are adjnstedxiu the drill-holes (in which the charge has'been previously placed) and ignited 'for'thepurposeof exploding the charge. In vertical or: nearly vertical drill-holes squibs of; a J-niorevv complicated and'elaborate construction con-i! sisting of two tubes, one within b then-the outer one serving as afasten1ng tube+ been employed, in order to suitably. secure 1" application filed pitch and shellac, filled with fine gunpowder, and having the other end sealed with a paste made of pl aster-of-paris, wheatflour, and water. The match is made of cotton 'wick, or other suitable material, drawn through melted rosin length. The match made in this manner is being of the highest importance that it should in order .to ignite tubeis made. v 1 p To connect the squib'with, the match, and adjust both properlyjin the drill-holefl em ploy the holder representedaatifl; "This consists of a suitably-sized piece of tinfor-other: f

sheet metahthe. rear end of which ,isgbentf down to form a shield,1 In-,thebodythereerforated at ofa-tongue, is stamped ou't,"p F, and bent forward] to form whatl term th This completes the fdevice Inoperation, the squib is fit are-coiled 'so as to form .a-tuhular-guide,

drill-hole,-which;has been previously charged, inthe-usualmanner.a j f.

#In, order to prevent the match' fi'om burnv zontal positiom which it readilyretains, owing the'lart'to which it appertains. thus described myinvention, I claim '-1'71". ,A-- mi'n'ers squib-holder consisting of a or Burgundy pitch, and cut into' suitable essential to the success "of my .inventio'n,it

burn slowly and steadily with a bright flame the material of which the,

match-holder, andin thesides o'f theblank; two incisions are made, forming flaps-Fabien;

"the-tubular; guide-.G,and )the jmatchi'isd a d-f 2 he'holdeaitlie p' hb f 1 F securely, vThe device .isjtheniadjusted in the ;,ing too rapidly, it may be turnedxto a horithenatu're of the' material-with which it is i adily appreciated by all an desire-to secure by Letters Patent of the metallicfblank formed with a down-turned shield, a perforated tongue or holder cut from provement I have hereunto set my hand this the body of said blank, and a tubular guide, 26th day of March, 1879. as set forth.

2. The combination, with a holder con- JOHN POWELL structed as described, of a sealed squib and a Witnesses: loose or independent match, as set forth. R. B. EDWARD,

In testimony that I claim the foregoing im- VAUGHN RICHARDS. 

